package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.exception.CustomException;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;

    private SetmealService setmealService;

    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        //添加查询条件,根据id查询
        lqw.eq(Dish::getCategoryId,id);
        int count = dishService.count(lqw);
        //查询当前分类是否关联菜品,如果已关联,则抛出业务异常
        if (count>0){
            throw new CustomException("当前分类下关联了菜品，不能删除");//已经关联菜品，抛出一个业务异常
        }



        //查询是否关联套餐
        LambdaQueryWrapper<Setmeal> tqw = new LambdaQueryWrapper<>();
        //添加查询条件,根据id查询
        tqw.eq(Setmeal::getCategoryId,id);
        int tcount = setmealService.count(tqw);
        //查询当前分类是否关联菜品,如果已关联,则抛出业务异常
        if (tcount>0){
            throw new CustomException("当前分类下关联了套餐，不能删除");//已经关联套餐，抛出一个业务异常

        }
        super.removeById(id);
    }
}
